Super Tough Anti‐freezing and Antibacterial Hydrogel With Multi‐crosslinked Network for Flexible Strain Sensor

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Abstract Addressing the diverse environmental demands for electronic material performance, design of a multifunctional ionic conductive hydrogel with mechanical flexibility, anti‐freezing capability, and antibacterial characteristics represents an optimal solution. Leveraging Dead Sea effect strong hydrogen bonding, this study exploits CaCl 2 abundant hydroxyl groups in phytic acid (PA) to induce chain entanglements, thereby constructing complex, multi‐crosslinked network. Furthermore, PA ternary solvent systems (CaCl /Glycerol/H O) synergistically impart excellent strength, toughness (with tensile strength 8.93 MPa, elongation at break 859.93%, 39.92 MJ m −3 ), high electrical conductivity, antifreeze properties, strain sensitivity (gauge factor up 2.10) hydrogels. Remarkably, structure maintains stability even after undergoing 6000 loading‐unloading cycles, demonstrating its outstanding fatigue resistance. Upon receiving external stimuli, exhibits response time 126 ms, making it ideal dynamic monitoring human motion signals. This offers novel insight into potential application hydrogels as flexible sensors challenging environments.

Language: Английский

Efficient Photoelectrocatalysis of Glycerol to Dihydroxyacetone and Synergistic Hydrogen Generation via Dual Oxidation Pathways Using Co-LDH/Bi₂O₃/TiO₂ Ternary Array

ACS Catalysis, Journal Year: 2025, Volume and Issue: 15(3), P. 2124 - 2138

Published: Jan. 22, 2025

Replacing the oxygen evolution reaction (OER) in photoelectrocatalytic (PEC) water splitting with glycerol oxidation (GOR) not only enhances hydrogen production but also generates high-value byproducts. In this study, we developed a ternary photoanode, Co-LDH/Bi2O3/TiO2, by loading particulate Bi2O3 and linear Co-LDH onto TiO2 nanorod for conversion production. The characterization results confirm formation of coupled interfaces between TiO2, which improves visible light utilization promotes type II heterojunctions, resulting significant suppression electron–hole recombination an improvement PEC performance. Fourier transform infrared (FT-IR) spectroscopy revealed that Co-LDH/Bi2O3/TiO2 photoanode exhibited stronger adsorption intermediate hydroxyl group more effective desorption DHA compared to binary photoanodes (Co-LDH/TiO2 Bi2O3/TiO2), high-selectivity DHA. Mechanistic studies density function theory calculations have shown Co-LDH/TiO2 oxidizes mainly through hole oxidation, Bi2O3/TiO2 radical (•OH) oxidation. Therefore, constructed (Co-LDH/Bi2O3/TiO2) dual heterojunction converts pathways •OH This work demonstrates promising strategy developing high-performance systems production, leveraging synergistic effects multisemiconductor heterojunctions multiple pathways, offering potential practical applications.

Language: Английский

Simple construction of bio-based 3D core-shell flame retardants by self-sacrificing template method: For the preparation of polyurea composites with flame retardancy, smoke suppression and preferable mechanical properties

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 458, P. 139690 - 139690

Published: Dec. 24, 2024

Language: Английский